Improvement in traction-engines



JOHN GREENSLADE.

- Improvement in Traction Engins. N0.1.23,3f95. Patented Feb 6,1872

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ATENT FICE IMPROVEMENT IN TRACTION-ENGINES.

Specification forming part of Letters Patent No. 123,395, dated February 6, 1872.

To all whom it may concern:

Be it known that I, J omv GREENSLADE, of Steeple-near-Haldon, in the county of Essex, England, have invented new and useful Improvements Applicable to Traction and other Engines; and I do herebydeclare that the following is a full, clear, and exact dBSCIHJiJlOIl thereof, which will enable others skilled m the art to make and use the same, reference being had to the accompanying drawingforming part of this specification.

My improvements are designed for rendering traction-engines, especially those used on common roads, well suited for descending or ascending steep inclines by mounting the boiler together with the engine, so that it may be maintained in a horizontal position, and thus keep the water always at the same level Whatever may be the inclination of the framing, whereby I prevent the priming of the engine, as well as injury to the fire-box and tubes irom excessive heat, such as is the case when the bo1ler is fixed to the framing in the usual manner.

To effect the above object I adopt the following means: I connect the boiler and working parts of the engine so that they may all move together, and provide the boiler to which the said working parts are attached with pivots, trunnions, or an axis or axes, placed at or near the center or otherwise, so that one end of the boiler may counterbalance the other. The engine and boiler may oscillate in hearings on the frame-work, which is provided with drivmg and steering wheels, as usual. The position of the boiler can be regulated by means of a screw or screws mounted to the foot-plate and working in nuts carried on the rear end of the boiler, or the boiler may be adjusted in other equivalent manner bymeans of which its rear end can be raised or depressed, as required, according as it is ascending or descending an incline. The front end of the boiler is also suitably supported for the purpose of avoiding undue strain on the oscillatin g bearings or framing when the engine is in motion. The cylinder may be mounted in any convenient position, and motion is transmitted therefrom to the drivingwheels by means of chain or other gearing through the medium of a pulley mounted on one or both of the boiler-trunnions, pivots, or axle or axles, before mentioned, which is prolonged to form an axis for the pulley, or any other equivalent arrangement may be adopted. By the above means the working of the engine is not in any way affected by the variable positions of the boiler. The pulley for transmitting motion to the driving-wheels being mounted at the cen ter of oscillation of the boiler, the distance between the main shaft and drivingpulley, as well as the strain, is at all times the same. The carriage and boiler can be carried on springs or not, as desired. These engines will be found very serviceable for the work performed by portable engines. One or more windlasses can be attached under the frame-work, and can be driven by suitable gearing from the intermediate wheel, rendering them more suitable for agricultural or other like purposes.

In the accompanying drawing, Figure 1 represents a side View of a traction-engine, constructed according to my invention. Fig. 2 is a plan or top View of the same. Fig. 3 is a detail side view of gearing, showing the mode of mounting and driving windlasses for agricultural and other machines. Figs. 4. and 5 are sectional-views, showing modified methods of hanging the boiler.

Similar letters of reference indicate corresponding parts.

a is the boiler. ters, resting in bearings c 0. cl are pulleys mounted upon the trunnions b, and receiving motion from the pulleys f on the engine-shaft e by straps or chains g. A clutch may be affixed to the engine-shaft, whereby the pulleys f may be thrown in and out of gear. h is another pulley on one of the trunnions b. It serves to communicate motion to a pulley, K, on the back driving-wheel 2' by means of a chain, j. I shows the steeringgear and wheels. m is the front screw, supporting the front end of the boiler, and is to be adjusted by hand by the steersman. n is a boss or nut, through which the screw m passes, and which can be adjusted to support the front end of the boiler at a suitable height by the screw m being turned, which causes the boss n to rise and fall. 0 0 are backscrews, mounted so as to allow them to fit automatically every position of the boiler. 19 is the boss through which the screws 0 work. It is mounted on brackets (1 attached to the boiler, so that when caused to rise or fall by the turnb b are its trunnions or cening of the screws the boiler is canted as required. 1' is a hand-wheel and shaft for turning the screws 0,-by the intermediate gearing or belt 26, shown in Figs. 1 and 2, said belt or chain passing over the pulley s that is mounted upon the shaft 1, and around pulleys t t, connected to the screws 0 0, causing them to turn and adjust the boiler as desired whenever the hand-wheel is turned.

When it is desired to use the engine as a portable engine it can be dismounted from the framing and mounted on wheels.

In Fig. 4 the boiler (L is shown with a cranked or curved shaft, u, passing under it, the ends b of which are mounted in bearings c. The pulleys in this case should be loose on the ends I).

In Fig. 5 the trunnions or centers 1) form part of brackets which are fixed to the boiler, and are hollow, to allow a shaft, 00, running in a bush, 3 to be hung in them. On this shaft 00 the pulleys d and it should be fixed.

In Fig. 3 are shown windlasses supported from the framing and driven from a wheel, A, on the trunnion or center I), by intermediate gearing-wheels B and beveled pinions O, which gear into bevel-wheels D fixed to the top of the windlasses. The pinion C may be thrown in and out of gear with the wheels D on the windlasses, as desired, by means of a clutch fixed to the shaft.

I do not claim the placing of a boiler on trunnions, axes, or centers except when arranged so as to combine with and oscillate at the same time as the working parts of the engine; nor do I claim the details per se and apart from the purposes of my said invention; nor do I limit myself to the precise form and arrangement of such details but I do claim as new, and desireto secure by Letters Patent 1. The boiler of a movable engine, when connected with the driving-engine or shaft, and hung in trunnions to be adjustable to varying degrees of inclination, as specified.

2. The combination of the pivoted boiler a with the front screw m and rear screws 0 0, substantially as and for the purpose herein shown and described.

The above specification signed on this 30th day of September,1869.

JNO. GREENSLADE.

Witnesses:

ALEX. P. WRIGHT,

Oockspur street, London. FREDERIG WILLOUGHBY,

7 Tokenhouse 3 01., London. 

